EUVD-2026-76570

In the Linux kernel, the following vulnerability has been resolved: NFSD: Prevent client use-after-free during NFSv4.0 revoked-state cleanup nfs40cleanadminrevoked takes a stateid reference under clp-cllock, drops nn-clientlock, and calls nfsd4droprevokedstid, which dereferences the stateid's...

CVE-2026-89658

CVE-2026-89658 is a use-after-free vulnerability in the Linux kernel's NFSD (Network File System Daemon) during NFSv4.0 revoked-state cleanup . The function nfs40_clean_admin_revoked() drops nn->client_lock and then calls nfsd4_drop_revoked_stid(), which dereferences the client via s->sc_cl...

CVE-2026-89658

In the Linux kernel, the following vulnerability has been resolved: NFSD: Prevent client use-after-free during NFSv4.0 revoked-state cleanup nfs40cleanadminrevoked takes a stateid reference under clp-cllock, drops nn-clientlock, and calls nfsd4droprevokedstid, which dereferences the stateid's...

CVE-2026-89657 libceph: validate OSD extent maps before cursor advance

In the Linux kernel, the following vulnerability has been resolved: libceph: validate OSD extent maps before cursor advance net/ceph/osdclient.c:osdsparseread validates that the sparse-read data length matches the summed extent lengths, but it does not validate that each OSD-supplied extent is...

CVE-2026-89656 libceph: reject buckets with mismatched CRUSH ids

In the Linux kernel, the following vulnerability has been resolved: libceph: reject buckets with mismatched CRUSH ids crushdecode stores bucket data by array slot, and the mapper later derives the per-bucket workspace index from the decoded bucket id. A malformed map can therefore make one bucket...

CVE-2026-89656

In the Linux kernel, the following vulnerability has been resolved: libceph: reject buckets with mismatched CRUSH ids crushdecode stores bucket data by array slot, and the mapper later derives the per-bucket workspace index from the decoded bucket id. A malformed map can therefore make one bucket...

CVE-2026-89656

CVE-2026-89656 is an out-of-bounds write in the libceph subsystem of the Linux kernel . The crush_decode() function stores bucket data by array slot, but a malformed CRUSH map can cause one bucket to alias another's workspace by encoding a mismatched id. When a larger source bucket's permutation ...

EUVD-2026-76568

In the Linux kernel, the following vulnerability has been resolved: libceph: reject buckets with mismatched CRUSH ids crushdecode stores bucket data by array slot, and the mapper later derives the per-bucket workspace index from the decoded bucket id. A malformed map can therefore make one bucket...

CVE-2026-89656 libceph: reject buckets with mismatched CRUSH ids

In the Linux kernel, the following vulnerability has been resolved: libceph: reject buckets with mismatched CRUSH ids crushdecode stores bucket data by array slot, and the mapper later derives the per-bucket workspace index from the decoded bucket id. A malformed map can therefore make one bucket...

CVE-2026-89655 ceph: fix UAF in __kick_flushing_caps() on cf entry freed during unlock

In the Linux kernel, the following vulnerability has been resolved: ceph: fix UAF in kickflushingcaps on cf entry freed during unlock listforeachentry iterates ci-icapflushlist but drops icephlock to send cap messages. During the unlock window, handlecapflushack can acquire icephlock, detach cf...

EUVD-2026-76567

In the Linux kernel, the following vulnerability has been resolved: ceph: fix UAF in kickflushingcaps on cf entry freed during unlock listforeachentry iterates ci-icapflushlist but drops icephlock to send cap messages. During the unlock window, handlecapflushack can acquire icephlock, detach cf...

CVE-2026-89654

In the Linux kernel, the following vulnerability has been resolved: ceph: fix UAF in checknewmap on session freed during unlock checknewmap iterates mdsc-sessions and for each active session drops mdsc-mutex to perform per-session operations. The forced-close path rank removed from map correctly...

CVE-2026-89654

CVE-2026-89654 is a use-after-free race condition in the Ceph file system component of the Linux kernel. The vulnerable function, check_new_map(), iterates over MDS sessions and drops the global mutex without holding a reference on the session struct in three code paths. A concurrent thread can t...

CVE-2026-89655 ceph: fix UAF in __kick_flushing_caps() on cf entry freed during unlock

In the Linux kernel, the following vulnerability has been resolved: ceph: fix UAF in kickflushingcaps on cf entry freed during unlock listforeachentry iterates ci-icapflushlist but drops icephlock to send cap messages. During the unlock window, handlecapflushack can acquire icephlock, detach cf...

CVE-2026-89655

In the Linux kernel, the following vulnerability has been resolved: ceph: fix UAF in kickflushingcaps on cf entry freed during unlock listforeachentry iterates ci-icapflushlist but drops icephlock to send cap messages. During the unlock window, handlecapflushack can acquire icephlock, detach cf...

CVE-2026-89655

A use-after-free (UAF) vulnerability exists in the Linux kernel's Ceph file system component, specifically in the __kick_flushing_caps() function. The root cause is a race condition : the function iterates over ci->i_cap_flush_list using list_for_each_entry() but drops i_ceph_lock to send cap ...

EUVD-2026-76566

In the Linux kernel, the following vulnerability has been resolved: ceph: fix UAF in checknewmap on session freed during unlock checknewmap iterates mdsc-sessions and for each active session drops mdsc-mutex to perform per-session operations. The forced-close path rank removed from map correctly...

CVE-2026-89653

In the Linux kernel, the following vulnerability has been resolved: ceph: reject exporttargets ranks = CEPHMAXMDS in mdsmap decode MDSMap exporttargets entries are monitor controlled. checknewmap uses each entry as a bit number in a fixed stack bitmap, so a rank outside the protocol namespace can...

EUVD-2026-76565

In the Linux kernel, the following vulnerability has been resolved: ceph: reject exporttargets ranks = CEPHMAXMDS in mdsmap decode MDSMap exporttargets entries are monitor controlled. checknewmap uses each entry as a bit number in a fixed stack bitmap, so a rank outside the protocol namespace can...

CVE-2026-89653

A vulnerability in the Linux kernel's Ceph filesystem allows an out-of-bounds write during MDSMap decoding. The MDSMap export_targets entries are monitor-controlled , and the check_new_map() function uses each entry as a bit number in a fixed stack bitmap. A rank value ≥ CEPH_MAX_MDS causes set_b...